Carton cases



March l0, 1959 K. R. REENBERG CARTON cAsEs Filed Oct. 51, 1955 ffy-1 IN V EN TOR.

United States Patent() CARTON CASES Knud Roeland Reenberg, Copenhagen, Denmark, assignor to Philipsen & Co., Copenhagen, Denmark Application October 31, 1955, Serial No. 543,931 1 Claim. (Cl. 229-37) The invention relates to a carton case, and more particularly to a hollow prismatic case used in combination with a slide drawer. Such cases are extensively used for packing many different sorts of goods, particularly cigars and cigarettes. Such cases have hitherto been made of cardboard blanks folded and glued into hollow prismatic shape around the edges of which a paper cover with printed text was folded and glued. This iinishing with a paper cover, however, made production difficult and highly expensive, the more so as the application of the paper cover had to be done by hand.

Attempts have been made to make the production of such cases less expensive by producing them of a single layer of carton on which the text was directly printed. Cases constructed in this way will be very weak and appy, and the roughly cut edges along the ends of the case will make it difficult to insert the drawer and will to a very great extent mar the appearance of the case, a fact which is of commercial importance as the case is to serve also as an advertisement for the goods therein contained.

lt is one object of the present invention to provide a carton case which as regards strength, insertion 'and easy movement of the drawer, the outer appearance,` and the neatness of the free ends of the case, will be fully on par with the known paper-covered cases without being so covered. The case according to the invention is further distinguished by the fact that it may in its entirety be machine-made, whereby its production will be materially cheaper than that of the known coated cases.

it is a known method of produce similar cartons in the manner, that the case is provided with tucks which are bent inwards along the inside of the walls of the prismatic case, whereby the latter will be stiened to a considerable extent. Known cases of this kind suffer, however, from the disadvantage that the tucks are placed only along one end of the prismatic case, so that only that end will show a smooth and regular edge, while the opposite edge will be roughly cut. Furthermore, in the known embodiments the tucks are bent loosely into the case and will therefore project into the hollowness and thereby prevent or impede the insertion and movement of the drawer.

According to the present invention these disadvantages are obviated thereby that the tucks are placed along all edges at both ends of the walls of the hollow prismatic case and glued to the inner surfaces of the walls. The result will be that the case according to the invention will have folded edges at both ends while at the same time the tucks are fastened to the inner sides of the walls of the case in such a way that they rest snugly up against the walls, stiffening them rigidly and presenting on the inside of the case a smooth supporting surface for the drawer insertedtherein so that no parts of the tucks will project into the track of the drawer and prevent or impede its insertion or movements.

The present case may according to the invention expediently be so designed that the two tucks connected with one and the same side-wall of the case when bent in and glued into position together will cover the entire inside of the side-wall and thus will form a smooth and regular support for the drawer. f

Carton cases of the-kind herein'dealt with are usually assembled in the manner that the blank along one longitudinal edge is provided with an edge web which, when the blank is folded into prismatic shape will be covered by the opposite longitudinal edge of the blank. The present invention entails the possibility that the edge web thus glued to the inside of the case may be enchased :by the tucks glued to the inside of the case, so that despite the presence of the edge web the inside of the case will be perfectly smooth. According to the invention this may be achieved by the tucks connected with the side-wall to which the adhesive web is to be fastened being provided with recesses so shaped and located that in their folded and glued position the tucks will enchase the edge web without covering it at any place.

When the carton case is produced in this manner it will be perfectly smooth and regular on the inside and of uniform thickness throughout, and will thus be fully equal to-and as regards rigidity even better than the paper-covered cases hitherto used, the production of which is far more expensive.

An embodiment of a case according to the invention is shown in the drawing, in which Fig. l shows a case blank in unfolded condition,

Fig. 2 the same blank after the folding of the tucks, and

Fig. 3 the assembled case in perspective drawing.

The blank from which the carton case is made is provided with slits 10, so that tucks 12-15 will Ibe formed along one edge and lr6-19 along the other edge of the case. Between the tucks thus produced and the outer sides, 22, 23, 24, and 2S, of the case and between the latter bending-lines 11 are provided making it possible to produce a case by impact. The lengths of tucks 12-19 are so chosen that in folded condition they will together cover the whole inner surface of the outer walls 22--25 of the case. ln the embodiment shown the sidewall 24 of the case is provided with an adge web 20, which when the blank is formed into the shape of a hollowl body as shown in Fig. 3 is to be glued to the inside of the outer wall 22 of the case. According to the invention, the tucks 12 and 16 connected to the wall 22 are provided with recesses so shaped that as shown in Fig. 2 they will when folded in give space for the adhesive web 20, so that the latter after having been glued to the inside of outer wall 22 will be entirely enchased by the tucks 12 and 16 without being overlapped at any point. As a consequence the nished case will despite the presence of the edge web Ztl be perfectly smooth inside.

The case is finished by tucks 12-19 being coated with glue on their inner surfaces whereupon they are folded in against the inner sides of the case and fastened as shown in Fig. 2, whereupon the case will be ready fo-r f assembly by coating the edge web 2i) with glue and glueing it to outer wall 22 as explained in the foregoing, the blank being during this operation folded along the bending lines 11a and 11b. The case will now be ready for the insertion of the drawer.

l claim:

A tubular casing for receiving a slidable drawer, said casing comprising a plurality of side walls each having longitudinal and transverse edges, the longitudinal edges on each side wall being joined to the adjacent longitudinal edges on adjacent side walls, all of said side walls forming a prismatic tube, end tucks joined to each ofthe transverse edges of said side walls and folded back against the sides of said side walls on the inside of the prismatic tube,

the opposite ends of aside" wall 'together cover the'entire length of the side wall without overlapping when so {Qlded back, one longitudinal edge of one of said side wallsbeing vjoined touftl'ieV adjacent `adge of the adjacent Side wall by means ofanedge web joined to said longitudinal edge of said one side wall, said edge web being glued to lthe 4side of the adjacent side wall on the inside of ,the p'rismatic tube, the end tucks on the ends of the adjacent ,side wall being of the same thickness as said edge web and having recesses in the edges thereof of ashape such that said end tucks will fit around said edge web and cover the area of the inside surface of said side v t j 'Mams not Vcovered by said edge web when folded back References Cited in the file of this patent UNITED STATES PATENTS Re. 21,287 Jonas Dec. 5, 1939 1,698,699 Andrews Ian. 8, 1929 2,328,591 Weil Sept. 7, 1943 2,344,999

Newsom Mar. 28, 1944 

